Locomotive-brake.



H. A. HOKB.

LOOOMOTIVE BRAKE.

APPLICATION FILED MAR. 24, 1914.

Patented June 16, 1914- 2 SHEETS-SHEET 2.

I A, A

INVENTOR S E S S M n w #4. ATTORNEY COLUIIIA rum-Am CO-.WMH|NGTON. D. C.

HARRY A. I-IOKE, OF ALTOONA, PENNSYLVANIA.

LOCOMOTIVE-BRAKE.

Specification of Letters Patent.

Patented J une 16, 1914.

Application filed March 24, 1914. Serial No. 826,890.

To all whom it may concern Be it known that I, HARRY A. I-IoKn, acitizen of the United States of America, residing in Altoona, in thecounty of Blair and State of Pennsylvania, have invented certain new anduseful Improvements in L0- comotive-Brakes, of which the following is atrue and exact description, reference being had to the accompanyingdrawings, which form a part thereof.

My present invention relates to locomotive brakes, and particularly tothe arrangement of the cylinders for actuating the driver brakes in alocomotive in which two brake cylinders are employed for this purpose.

Heretofore it has been the practice to employ two brake cylindersarranged side by side to actuate the driver brakes on certain classes oflocomotives, but with certain types of heavy locomotives now coming intouse it is diflicult or impossible to arrange the two brake cylindersside by side, partly on account of the increased diameter which it isnecessary to give the brake cylinders to enable them to operate with thedesired power, and partly because the increased frame strength necessaryin these heavy locomotives diminishes the available space in which thecylinders may be mounted.

The object of my invention is to provide a simple and effectivearrangement which permits the brake actuating cylinders of a heavylocomotive of the kind referred to above to be located in convenientplaces where suflicient space is available; and which permits thecylinders to be placed, each with its center line nearer the center lineof the locomotive than would be possible if the cylinders were mountedside by side.

The various features of novelty which characterize my inventlonarepointed out with particularity in the claims annexed to and forming apart of this specification.

.For a better understanding of the invention,

however, and of the advantages possessed by it, reference should be hadto the accom panying drawings and descriptive matter in which I haveillustrated and described a preferred form in which my invention may beembodied.

Of the drawings: Figure 1 is a somewhat diagrammatic plan of alocomotive equipped with my invention; Fig. 2 is a somewhat diagrammaticelevation of the locomotive shown in Fig. 1; Fig. 3 is a partial sideelevation, partly broken away and in section, of the locomotive shown inFigs. 1 and 2; and Fig. 4 is a partial end elevation with parts brokenaway and in section of the locomotive,

In the drawings, A represents the locomotive frame as a whole, and Brepresents the locomotive drivers, of which there are four pairs in thelocomotive shown. There are one pair of brake shoes C for each pair oflocomotive drivers. The brake rigging proper, in the particular formshown in the drawings, comprises a brake beam D connected at its ends tothe brake shoes G for the rear pair of drivers. A connecting rod E isconnected at one end to the center of the brake beam D, and at theopposite end is connected to the inner ends of a pair of short brakelevers F, f. The outer end of the lever F is connected to the brake shoeC engaging the right hand rear intermediate driver wheel. The brakelever f is connected at its outer end to the brake shoe 0 engaging thecorresponding left hand driver. The levers F, f are connected at theircenters to connecting rods E, 6, respectively. The connecting rods E, e,are connected at their front ends to short levers G, g, respectively.The levers G, g are connected at their inner ends by a yoke G to thebrake beam D. The latter is connected at its ends to the brake shOes Oengaging the front intermediate drivers. The levers G, g are 0011-nected between their ends to connecting rods E 6 respectively. The rodsE and e are connected at their front ends to the inner ends of brakelevers F and f, respectively. The levers F and f are connected at theirouter ends to the brake shoes G for the front pair of drivers. Aconnecting rod E is connected at its rear end to the lever F between theends of the latter, and is connect-ed at its front end to a rocker Hjournaled on a stationary shaft A secured in and really forming a partof the locomotive frame, A. Similarly the rear end of a connecting rod eis connected to the lever f les between the ends of the latter, and thefront end of the rod 6 is connected to the rocker It also j ournaled onthe stationary shaft A The rocker H is formed with a horizontallydisposed arm H, which is connected at its outer end by the couplingmember I to the brake actuating plunger J of the brake cylinder J. Thelatter has its axis vertically disposed and but slightly to the right ofthe center line of the locomotive. As shown, the brake cylinder J isformed with a flange J 2 secured against the vertical side of the crossportion A of the locomotive frame. The rocker i1, is formed with avertical'ly disposed arm it, which is connected to and actuated by thebrake actuating plunger y" of the brake cylinder j, which has its axishorizontally disposed, and but slightly to the left of the center planeof the locomotive. As shown, the cylinder j is provided with a flangesecured on the top of the cross portion A of the locomotive frame. Asshown, the connections between the plunger j and the rocker arm h,

comprise a coupling member 6 connecting the plunger j to a lever 7?,connecting rods 71 lying at opposite sides of the cylinder jandconnecting the ends of the lever 11 to the ends of the lever z'. Thelatter is directly connected. to the upper end of the rocker arm h. Asshown, the lever 7: slides in guides A secured to the locomotive frame.

In the preferred arrangement shown, the axis of the shaft A on which therockers H and it turn is located well in front of, and slightly beneaththe axis of the front drivers. The axis of the vertical cylinder J islocated well to the rear of the axis of the front drivers, while thecylinder j is located .well above the axis of the front drivers. Therocker arms H and h are inclined so that their free ends are in linewith the axes of the cylinders J and j, respectively, while the rockersproper are in line with the connecting rods E and 0 The rockers H and hare readily made stiff enough, and with suflicient bearing surface onthe shaft A so that the lateral displacement of the free end of eachrocker arm (H, h) relative to the connection of the rocker to thecorresponding connecting rod (E 6 will neither bend the rocker arm, norcreate an undesirable binding of the rocker on the shaft A In thearrangement described the brake actuating cylinders J and j may be -madeof ample size to provide sufficient braking power with the usualrelatively short travel of the brake cylinder pistons, and the cylindersare conveniently disposed in locations where suflicient space isavailable. The center of gravity of each of these cylinders is close tothe central plane of the locomotive, as is desirable. As shown in Fig.4, the two cylinders are located at opposite sides of said central planebut at a distance therefrom appreciably less than the radius of thecylinder in each case.

lVhile in accordance with the provisions of the statutes I haveillustrated and described the best form of my invention now known to me,it will be apparent to those skilled in the art that changes may be madein the form of apparatus disclosed without departing from the spirit ofmy invention, and that under some conditions certain features of myinvention may be used without a corresponding use of other features.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is: g

1. I11 a locomotive, the combination with the frame and drivers of abrake mechanism comprising a pair of rockers provided one with ahorizontally disposed arm and the other with a vertically disposed arm,a brake cylinder mounted on said frame with its axis horizontal andconnected to and actuating said vertically disposed arm and a secondbrake cylinder mounted on said frame with its axis vertical andconnected to and actuating said horizontally disposed arm.

2.'In a locomotive, the combination with the frame and the driversthereof, of two brake actuating cylinders one having its axis horizontaland being mounted on said frame above the axis of the front pair ofdrivers, and the other having its axis vertical and being mounted on theframe at the rear of the axis of the front pair of drivers, a pair ofrockers journaled in said frame to turn about an axis in front of theaxis of the front pair of drivers and each connected to and actuated bya corresponding one of said cylinders, and brake operating mechanismconnected to the two rockers.

3. In a locomotive, the combination with the frame and drivers of abrake mechanism comprising a pair of coaxial spaced apart rockers'provided one with a horizontally disposed arm and the other with avertically disposed arm, a brake cylinder mounted on said frame with itsaxis horizontal and connected to and actuating said vertically disposedarm and a second brake cylinder mounted on said frame with its axisvertical and connected to and actuating said horizontally disposed arm,said cylinders having their axes located at opposite sides of thecentral longitudinal plane of the locomotive but at a distance therefromappreciably less than the radius of each cylinder.

4. In a locomotive, the combination with the frame and drivers of abrake mechanism comprising a pair of coaxial spaced apart rockersprovided one with a horizontally disposed arm and the other with avertically disposed arm, a brake cylinder mounted on said frame with itsaxis horizontal and connected to and actuating said vertically disposedarm and asecondbrake cylinder mounted on said frame with its axisvertical and connected to and actuating said horizontally disposed arm,said cylinders having their axes located at opposite sides of thecentral longitudinal plane of the locomotive but at a distance therefromappreciably less than the radius of each cylinder, and said arms beingbent away from the central plane of the locomotive whereby the rockersare 10 spaced apart a distance greater than the dis tance between theaxes of said cylinders.

HARRY A. HOKE. Witnesses J. L. WERTZBERGER, J. T. HANLON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

